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#!/usr/local/bin/node
//
// See ../README.md
//
//
// Run as: node ch-2.js < input-file
//
let w = [1, 3, 1, 7, 3, 9, 1]
require ('readline')
. createInterface ({input: process . stdin})
. on ('line', line => {
line = line . trim ()
if (line . length != 7 ||
line . match (/[^0-9BCDFGHJKLMNPQRSTVWXYZ]/) ||
line . match (/[^0-9]$/)) {
console . log (0)
}
else {
let check = 0
for (let i = 0; i < 7; i ++) {
let val = line . charCodeAt (i)
val -= (val <= "9" . charCodeAt (0) ? "0" : "A") . charCodeAt (0)
check += w [i] * val
}
console . log (check % 10 == 0 ? 1 : 0)
}
})
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